Machine for bending metal scrolls for polishing-wheels.



PATENTED AUG. 15, 1905 v. W; JEWETT. MAOHINE FOR BENDING- METAL SGROLLS FOR POLISHING WHEELS.

APPLICATION FILED NOV. 1,1904.

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Patented Aug. 15, 1905.

Application filed November 1, 1904. Serial No. 230,976.

To all whom, it 'lrm (BUN/(78PM:

Be it known that I, VERNON WV. J'nwe'r'r, a citizen of the United States, residing at Montpelier, in the county of Dishing-ton and State of Vermont, have invented certain new and useful Improvements in Machines for Bending Metal Scrolls for Polishing-Wheels, of which the following is a specification.

This invention relates to rotary devices for bending strips of metal to form scrolls for polishing-machines, it being also applicable to other like purposes.

The said invention consists in the construction and combination of parts hereinafter more particularly set forth and claimed.

In the accompanying drawings, Figure 1 represents a plan view of a machine embodying my invention; and Fig. 2 represents a vertical central section through the same on the line 2 2 of Fig. 1, the shafts being shown in elevation.

A. designates the base-frame of the machine, affording bearings for the horizontal drivingshaft 13, carrying a bevel-pinion B, and for the vertical shaft L, having scroll-forming wheel C and crown gear-wheel M mounted thereon to turn therewith the said crown gear-wheel being in mesh with said pinion and driven thereby. The upper end of shaft L is screw threaded to receive a nut Z, which clamps a plate 6 against the block D and holds the said shaft L and wheels C and M in place. The said scroll-forming wheel U is provided with the raised scroll-shaped central block D and outer removable scroll-shaped ribs (Z in continuation thereof, also with an intervening scroll-shaped groove 1) and with holes a in its outer part for the reception of removable pins a. The inner end of the said groove is adapted to receive a wedge E. The said removable ribs are provided with eyes or hooks 0 for convenience of removing and replacing them. The said detachable ribs are attached to the forming-plate U by pins Z and provided on their inner sides with shoulders X, which fit into corresponding recesses of the relatively fixed parts of the wheel to additionally secure said ribs against accidental displacement, though permitting their withdrawal by lifting, substantially as set forth.

The operation is as follows: The metal strip or ribbon 1 to be operated on is placed in groove 1), one end being fastened by wedge E, inserted therein, and the said strip being bent around the central block .1). Shaft B is then operated to rotate wheel U through the gearing aforesaid. The pins a are then slipped into the holes a to make the said strip hug the said block and ribs during their revolution, the said strip or ribbon being guided meanwhile into said groove and will necessarily be wound into scroll form. The wheel C, removable ribs (Z, wedge E, and pins rt are of sufliciently strong metal to bend the strip or ribbon whether it be cold or warm, and the shape and proportions of the operating parts with the degree of power applied insure its receiving and retaining the proper crn-vature. Then this operation is complete, the said ribs are lifted out of the wheel by means of eyes 0 and the wedge E is withdrawn, thus readily freeing the new scroll. Said ribs may then be replaced and the operation repeated on another metallic strip or ribbon.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a scroll-forming machine, a wheel provided with a central scroll-form block and a raised exterior part, the latter having holes in its top, in combination with scroll shaped ribs, which form with said block said raised part and each other an intervening scrollform groove, said ribs being adapted to be lifted out at will, pins adapted to be inserted in said holes for assisting to hold the metallic ribbon to be operated on, means for detachably fastening the inner end of said ribbon in the inner end of the groove and means forv supporting and rotating the said wheel substantially as set forth.

In testimony whereof Ial'lix my signature in presence of two witnesses.

VERNON \V. JEVVET".

W tnesses:

THOMAS J. DnAvrrtr, GEORGE W. Lane. 

